Method setHeaderFormat

src/backend/matrix/Matrix.cpp:315–326

TODO: make this undoable?

// TODO: make this undoable?
void Matrix::setHeaderFormat(Matrix::HeaderFormat format) {
	Q_D(Matrix);
	d->headerFormat = format;
	m_model->updateHeader();

#ifndef SDK
	if (m_view)
		m_view->resizeHeaders();
#endif

	Q_EMIT headerFormatChanged(format);
}

// columns
void Matrix::insertColumns(int before, int count) {